A study of vibration behavior in shoe sole using vibration level difference and power flow method

Abstract

Vibration is a common phenomenon in people’s daily life. As the main bearing part of the human body, the foot can cushion the impact and shock of external force, and alleviate the influence of external vibration on the human body. Footwear with different structures and materials could cause kinematic, kinetic and biomechanical changes in the foot and leg. It is necessary to evaluate the effects of various footwear on the foot. In this paper, a method based on the vibration cushion characteristics of shoes is proposed to discuss the effect of shoes on feet. First of all, the modal test of the common sole was carried out in this paper, and the acceleration vibration level difference of the sole was obtained. Then, based on the finite element method, the power flow method was used to analyze the soles under different gait patterns. Finally, the vibration analysis of the soles filled with different porous structures was carried out by power flow method. The results show that the vibration level difference and power flow method can be used to study the vibration behavior of vibrating body from the aspects of structure and energy accurately and effectively, and the soles filled with triangular and quadrilateral porous structure have better damping performance. This method can be used to further study the biomechanical effect of the sole on foot and as a reference for shoe design.